Punching-machine



(No Model.)

P. L. JOHNSON. PUNGHING MACHINE.

N 0. 513,933"; Patented Jan. 30, 1894.

I I w W/TNESSES. 2 2) INVENTOH I B) W I I I ATTORNEYS.

THE NAYIONAL LITHQGRAPNING cmaPAm'. WASHINGTON, u. c.

UNITED STATES PATENT OFFICE.

PAUL L. JOHNSON, OF BISHOP HILL, ILLINOIS.

PUNCHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 513,933, dated January 30, 1894.

Application filed November 14, 1893. Serial No. 490,937. (No model.)

T at whom it may concern:

Be it known that I, PAUL L. JOHNSON, of Bishop Hill, in the county of Henry and State of Illinois, have invented anew and Improved Punching-Machine, of which the following is a full, clear, and eiact description.

My invention relates to improvements in that class of punching machines which are used for punching holes in metal, and particularly for punching cold iron.

The object of my invention is to produce a very simple, strong and durable hand-operated machine, which is provided with a series of operating levers, arranged in such a way as to enable the machine to be rapidly and effectively worked, and also to enable the machine to work with practically no friction and with great power.

To these ends my invention consists of certain features of construction and combinations of parts, as will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar figures of reference indicate corresponding parts in both the views.

Figure 1 is a side elevation of the machine embodying my invention; and Fig. 2 is a sectional plan on the line 2-2 of liig. 1.

The machine is provided with a suitable supporting frame 10, which may be of any approved shape, although the form illustrated is preferably used, and as here shown the frame is elongated vertically and itsback is of a trough-like shape, as shown at 11 in Fig. 2, so-that it may be securely clamped to a supporting plank 12, or equivalent support, which plank enters the recess in the frame back. 7

At-the lower end of the frame 10 is a forwardly-projecting lug 13, which carries the die plate 14, this having a series of holes 14 in it of diiferent sizes to correspond with the punch used in the machine, and the plate may be turned around so as to make any hole register with the punch. The die plate 14is held in place by a bolt 15, which extends downward through the'lug 13 and is provided with a thumb nut 16. The machine has arranged above the die plate a vertically slidable punch bar 17, which moves in guide keepers 18, and the punch 19 is fastened in any usual wayin the lower end of the bar, being held in place by a set screw 20. The punch may be of any ordinary kind and is adapted to register with the holes in the die plate 14.

Pivoted to the upper end of the punch bar 17, as shown at 21, is a drive bar 22, which extends upward in front of the frame 10 and is at its upper end pivoted, as shown at 23, to the drive lever 24, this being pivoted at its upper end, as shown at 25, between lugs 26 near the top of the frame 10.

The drive lever 24 has its free or lower end connected, by means of the rods 27 which straddle the frame 10, with the upwardly-extending portions 28 of the forked handle lever 29, which also straddles theframe and the drive bar 22, as shownclearlyin Fig. 2. This handle lever 29 is an elbow lever, and the rods 27 connect with it near its elbow while the upper end of the short arm is fulcrumed at 30 to the frame 10. It will thus be seen that when the handle lever is raised it will throw out the lower end of the drive lever 24, which lifts the drive bar 22 and punch bar 17, but the movement of the punch bar and drive. bar is very limited. When the handle bar is moved down, the opposite action takes place, and the lower end of the drive lever 24 is thrown inward, thus carrying in the upper end of the drive bar 22 and also moving the drive bar and punch bar downward, this action being effected quickly and giving to the punch bar a powerful stroke.- The punch is thus brought forcibly upon the metal, which is arranged between it and the die plate, and a hole is punched in the metal.

The lever 24 and the handle lever 29 are provided with a series of holes 31 and 32, so that the pivot pins of the connecting rods 27 may be adjusted in different holes to give to the punch the requisite force.

7 It will be readily seen that by adjusting the connecting rods in the holes 31 and 32, the punch may be made to move with a long stroke and relatively small power, or it may be made to move with a shorter stroke and greater power.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A punching machine, comprisinga supporting frame carrying a die plate, a punch bar held to move vertically above the die plate and adapted to carry apunch, a swinging drive lever pivoted at its upper end to the frame above the punch bar. and extending downwardly a drive bar connecting the drive lever and the punch bar, a handle lever having an elbow whose short arm is pivoted behind the drive lever to the frame, and an operative connection between the elbow of the handle lever and the lower end of the drive lever, whereby the two move in unison, sub stantially as described.

2. A punching machine, comprising a supporting frame, a die plate carried at the lower end of the frame, a vertically movable punch bar adapted to carry a punch and held to slide in guides on the frame, a drive lever pivoted at its upper end near the top of the frame, a drive bar connecting the drive lever and the punch bar, a handle lever having an upwardly extending arm fulcrumed to the frame behind the drive lever, and a connecting rod extending from the handle lever from a point below its fulcrum to the drive lever, substantially as described.

3. The combination, of the reciprocating punch bar, the drive lever pivoted above the punch bar, the drive bar connecting the drive lever and punch bar, the swinging handle lever fnlcrumed behind the drive lever, and an adjustable connection between the drive lever and the handle lever, substantially as described.

4. A punching machine, comprising a supporting frame having a projecting lug at its lower end, a die plate carried by the lug, a vertically movable punch bar held to slide in guide keepers above the guide plate, a drive lever pivoted above the punch bar, the drive bar connecting the drive lever and the punch bar, a forked handle lever straddling the frame and fnlcrumed behind the drive lever, and connecting rods also straddling the frame and uniting the drive lever and handle lever, substantially as described.

PAUL L. JOHNSON.

Witnesses:

B. J. ARUQUIST, E. L. SWANSON. 

